/**
 * BibSonomy-Rest-Client - The REST-client.
 *
 * Copyright (C) 2006 - 2016 Knowledge & Data Engineering Group,
 *                               University of Kassel, Germany
 *                               http://www.kde.cs.uni-kassel.de/
 *                           Data Mining and Information Retrieval Group,
 *                               University of Würzburg, Germany
 *                               http://www.is.informatik.uni-wuerzburg.de/en/dmir/
 *                           L3S Research Center,
 *                               Leibniz University Hannover, Germany
 *                               http://www.l3s.de/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.bibsonomy.rest.client.queries.put;

import static org.bibsonomy.util.ValidationUtils.present;

import java.io.StringWriter;

import org.bibsonomy.model.Document;
import org.bibsonomy.rest.client.AbstractQuery;
import org.bibsonomy.rest.enums.HttpMethod;
import org.bibsonomy.rest.exceptions.BadRequestOrResponseException;
import org.bibsonomy.rest.exceptions.ErrorPerformingRequestException;


/**
 * query to rename a document
 * 
 * @author dzo
 */
public class ChangeDocumentNameQuery extends AbstractQuery<String> {
	private String username;
	private String resourceHash;
	private String fileName; /* the old one */
	
	private Document document; /* the new document */

	/**
	 * 
	 * @param username 
	 * @param resourceHash
	 * @param newFileName
	 * @param oldDocument
	 */
	public ChangeDocumentNameQuery(final String username, String resourceHash, String fileName, Document document) {
		if (!present(fileName)) throw new IllegalArgumentException("no new name given");
		if (!present(resourceHash)) throw new IllegalArgumentException("no resourceHash given");
		
		if (!present(document) || !present(document.getFileName())) throw new IllegalStateException("no old document name given");
		if (!present(document.getUserName())) throw new IllegalStateException("no user name given");
		this.resourceHash = resourceHash;

		this.fileName = fileName;
		this.document = document;
	}

	@Override
	protected void doExecute() throws ErrorPerformingRequestException {
		final StringWriter sw = new StringWriter(100);
		this.getRenderer().serializeDocument(sw, document);
		
		final String url = this.getUrlRenderer().createHrefForResourceDocument(this.username, this.resourceHash, this.fileName);
		this.downloadedDocument = this.performRequest(HttpMethod.PUT, url, sw.toString());
	}
	
	@Override
	protected String getResultInternal() throws BadRequestOrResponseException, IllegalStateException {
		if (this.isSuccess()) {
			return this.getRenderer().parseResourceHash(this.downloadedDocument);
		}
		return this.getError();
	}
}
